LTM2884 USB Transceivers

The LTM®2884 from Linear Technology is a complete galvanically-isolated USB 2.0 compatible μModule® (micromodule) transceiver. An upstream supply powers both sides of the interface through an integrated, isolated DC/DC converter. The LTM2884 is ideal for isolation in host, hub, bus splitter, or peripheral device applications. It is compatible with USB 2.0 full-speed (12 Mbps) and low-speed (1.5 Mbps) operation. Automatic speed selection configures integrated pull-up resistors on the upstream port to match those sensed on the downstream device.

The isolator μModule technology uses coupled inductors and an isolated power transformer to provide 2500 VRMS of isolation between the upstream and downstream USB interface. This device is ideal for systems requiring isolated ground returns or large common mode voltage variations. Uninterrupted communication is guaranteed for common mode transients greater than 30 kV/μs. Enhanced ESD protection allows this part to withstand up to ±15 kV (human body model) on the USB transceiver interface pins to local supplies and ±15 kV through the isolation barrier to supplies without latch-up or damage. View full-size image